M1={{a1,a2}}*{{b1},{b2}}[br]M2={{a1},{a2}}*{{b1,b2}}[br]M3={{a1,a2,a3}}*{{b1},{b2},{b3}}[br]M4={{a1},{a2},{a3}}*{{b1,b2,b3}}[br]M5={{a11,a12},{a21,a22}}*{{b1},{b2}}[br]M6={{a1,a2}}*{{b11,b12},{b21,b22}}[br]M7={{a11,a12},{a21,a22}}*{{b11,b12},{b21,b22}}
M1={{a1},{a2}}*{{b1,b2,b3}}[br]M2={{a1},{a2},{a3}}*{{b1,b2}}[br]M3={{a1,a2}}*{{b11,b12,b13},{b21,b22,b23}}[br]M4={{a11,a12},{a21,a22},{a31,a32}}*{{b1},{b2}}[br]M5={{a11,a12},{a21,a22}}*{{b11,b12,b13},{b21,b22,b23}}[br]M6={{a11,a12},{a21,a22},{a31,a32}}*{{b11,b12},{b21,b22}}[br]M7={{a11,a12},{a21,a22},{a31,a32}}*{{b11,b12,b13},{b21,b22,b23}}[br]
M1={{a11,a12,a13},{a21,a22,a23},{a31,a32,a33}}*{{b1},{b2},{b3}}[br]M2={{a1,a2,a3}}*{{b11,b12,b13},{b21,b22,b23},{b31,b32,b33}}[br]M3={{a11,a12,a13},{a21,a22,a23},{a31,a32,a33}}*{{b11,b12},{b21,b22},{b31,b32}}[br]M4={{a11,a12,a13},{a21,a22,a23}}*{{b11,b12,b13},{b21,b22,b23},{b31,b32,b33}}[br]M5={{a11,a12,a13},{a21,a22,a23},{a31,a32,a33}}*{{b11,b12,b13},{b21,b22,b23},{b31,b32,b33}}